Phonograph shaving collector



July 18, 1950 w. E. M CONNELL ET AL 2,515,309

PHONOGRAPH SHAVING COLLECTOR Filed Sept. 28, 1948 I INVENTOR. /C EDWINL. BZPACLI B1 fy 11 TTOR NE 16' Patented July 18 I950 Winton E.McConnell and Edwin L. Bracy,

Charlotte, Mich., assignors to Wilcox-Gay Cor.-

Mich., a corporation of poration, Charlotte, Michigan ApplicationSeptember 28, 1948, Serial No.51,597

Our present invention relates to a combined shaving collector and moreparticularly to an improvement of the shaving collector inventions shownin Patent No. 2,351,948 and application Serial No. 757,135, bothassigned to the assignee of the present invention.

More specifically, our invention relates to an auxiliary shavingcollector secured to the cutting arm of a phonograph record cutter ofthe instantaneous recording type in order to enhance the shavingcollecting action, thereby ensuring that the shaving cut from the recordwill gather properly around the spindle or around any shaving collectingtab which may be used on the record itself.

In instantaneous recording where a groove is cut in a record which isgenerally coated with a cellulose acetate material, the thread cut fromthe groove is thrown' inwardly slightly by the action of the cuttingneedle. This thread normally tends to continue to rotate. with therecord and if left in position may foul the cutting needle as thecutting needle is driven inwardly.

The disclosures of the above-mentioned patent and application weredirected to the provision of a flexibility mounted rubber collectingfinger dragging lightly on the record surface just inwardly of theneedle and engaging and holding stationary a portion of the thread sothat when the other end of the thread was carried around the spindle bythe rotation of the record, the thread would be caught on the spindleand wind up thereon.

The present invention contemplates the addition of an extra shavingcollector placed. further inwardly of the 'record surface than the firstshaving collector providing an additional anchor for the thread cut fromthe groove, ensuring an even and rapid wrapping of the thread around thespindle and efficient collection of the thread.

In the prior shaving collector previously mentioned, the shavingcollector unit was generally hung from the neck of thescrew or boltwhich fastened the cutting needle in the cutting cartridge. Since thecutting cartridge itself was flexibly mounted for vertical compliance,the shaving collector hung thereon also had some vertical compliance. I

In addition, the shaving collector was so arranged that it was intendedto drag slightly on the record and was thereby carried around so that itwas inclined toward the center of the record.

This shavingcollector in addition to;

1 Claim. (Cl. 274-47) to hold the thread tended also further to throwthe thread inwardly, thus enhancing the centripetal action of the needleonthe thread.

The present invention contemplates securing a rigidly mounted rubberfinger on the cutting arm unit radially inwardly of the initial shaving:collector previously used and spaced so that its lower end is not overof an inch above the surface of the disc. 1 Furthermore, the additionalshaving-collector toward the center of the record tends to wind thethread tightly around the turntable spindle since it projects past thecutting area of the record covered by the original collector finger.This leaves the entire playing area of the record free from threadswhich might catch the play-'- back needle and hinder play-back orautomatic operation if used on automatic self-tripping equipment. i Anythreads cut from the groove and thrown inwardly by the cutting action ofthe needleand by the action of the original shaving collector would thusbe caught by the additional shaving collector and held stationary at thepoint of capture until the movement of the record carries anotherportion of the thread around the spindle resulting in a, winding up ofthe thread. Although the thread is a great deal smaller in diameter'thang of an inch, it nevertheless'can be caught and held by a rubber'fingerspaced about of an inch above the surface of the record since the threadtends to curl and twist owing to the fact that it is cut sinuously fromthe sound track.

The primary object Of the present invention, therefore, is the provisionof a novel shaving collectorfor instantaneous recording instruments.Another object of our invention is the provision ofdoubleshavingcollector'units for an instantaneous recording record cutterwherein both units are mounted on the cutting element of theinstantaneous recorder with one of the units being mounted for someslight relativemovement with respect to' the cutting arm and the otherof the shaving units being mounted rigidly and having a definite shavingcollecting position with respect to the cutting arm.

Another object of our invention is the provision of a rigidly mountedshaving collector on the cutting arm located inwardly of the cutting needle and positioned to act as a drag upon a thread cut from a groove inthe record and'thrown inwardly by the cutting needle. v v E The ,fp e msnd m nvpther b ects. 01; 011

invention will become apparent in the following description and drawingsin which: s

Figure 1 is a view in perspective showing our novel combined shavingcollector construction.

Figure 2 is an enlarged end view of the cutting arm showing the shavingcollector elements mountedlinposition. H

Figure 3 is a bottomwiew of the cutting arm showing the shavingcollector elements in posi tion.

Referring now to the figureathe outting arm I is provided with a cuttinghead or cartridge I l flexibly mounted therein int-any suitable manneras, for instance, in the manner described in Patent No. 2,351,948.

The front of the cutting arm I'll has an open- 25, the additional dragof the additional shaving collector 30 becomes efiective.

This is so even though the shaving collector 30 does not actuallycontact the record since the cutting of the thread or shaving alon asinuous path makes it twist sufiiciently to be high enough to be engagedby the additional shaving collector 30.

'If, as sometimes happens, the action of the cutting unit i4 is strongenough to throw the thread or shaving in beyond the point 2| of theshaving collector .;2U, ,then =,the shaving collector 38 comes intoaction and serves to capture the thread or shav ng,

ing I2 through which the screw or bolt l3wvhich secures the stylus l4 inthe cartridge l I, is accessible.

The first shaving collector is a generally triangular member oftr-flexible rubber having -a substantially: pointed end/2i.in'contactwith the surfa'ceroft record'i22, the wider end "of theshavingrc'ollector 2n being provided with-an: opening try-which itiimaybe mounted on the screw-13. "The 'distan'cefrom the mounting opening ofthe= shaving co'llector 20 and its pointed end"'2 'I is--'s1i.ghtlygreater than the normal distance from the screw I3 to therecord surface sc -that the shaving-collector Zll' Willbeinclined-slightly inwardly radially of'the cutting stylus. IIf, -whenthe record arm is placed ontherecarid, the 'point 2l of the shavingcollector '20 should be i-outside L' the stylus l 4 r further away fromthe spindie'iof the turntablathen the rotation of the record 22 in'the'direction indicated by the "arrow will swing the "shaving collector 23in the direction of rotation of'the record and around to a positionwhere the shaving-"collector pointil will be in-Ward radially of stylus"I4. 7 {Ilhe shaving*collector-ZlLtherefore, as described iWBatent No;2351,9518 serves-to exert a drag on any-threador shaving which may bethrown inwardly bythe-action-oi the-cuttin -ncedle' r styiusi-Q. l

However, itsome-times occurs that the ;dr-ag,-es-.

pecially owing totheflexibility and loose mount automatic :recordingdevices ofthe type'shown This is actually the primary advantage of thepresent 'inventionin that the shaving collector 26 will usually engagethe shaving cut during recording'at low frequencies Where the shavingmay not be, thrown inwardly more than one or two millimeters while theshaving collector 3t acts as a safeguard to capture "and exert a drag onany shaving which may-be thrown inwardly by the cutting needle to' agreater degree, especially duringrecording-ofhigh'irequency notes wherethe actionof theclittl'ng' needle may .be more Violent. seen in theschematic view of Figure 1, the shaving collectors 2G and 30 exert adrag on'the shaving or thread fifi so thatas the record pulls theotherend of the shaving or thread' li! through the positionsof 40a, 60b, and400, the dra exerted'by the'shaving collectors Z0 and '39 causes theshaving 40 to assume the position of a secant on an are which rapidlyincreases in degree until the'secant becomes a diameter and intersectsthe spindle25, whereupon-the shaving along the secant is pulled aroundthe spindle 25 and begins to wind upthereon, I} The shaving {normallycontinues to wind up aroundthe'sprind1e'25' as the record rotates untilthe shaving breaks, whereupon the operation is repeatedtheshavingcollectors 20 and 3B exerting adrag on one end of the shaving until theotherendbf'theshavingheld by the record is pulledaround' the spindle 25once more to Wind lniactualj practice we have found that the utilizationof the compound shavin collectors 20 and 3|),results in a clean recordsurface in which no shavingsremain to mar the recording and in which theshavings are immediately captured and wound up Onthespindle or othershavingcollector element which maybe used, thereby maintaining a recordsurface on which an accurate cut may he made.

H wever, i is o-be underst d tha he inside shaving collector 30 may beused w t t e shavingcollector'zn being used in com i a on as there willbe a normalthrow f the shavin walidly from the cutting stylus l4assisted, of course, bythe-ro atioh-of the dis being out r ging on theshaving; While it is preferred that h shaving coll ctor 3B beresilient,,;sat sfactory result are obtainable whenitis rigid as of apiece of wire, forex mp 1 In the-foregoing We have described ourinvention solely in connection with specific illustrative embodimentsthereof. Since'many variations and modificationsiof our'invention willnow be obvious to'those skilledin the art, we prefer to be bound not bythe specificdisclosures herein contained but ohlvby heapp nded'claim,

A'shaving collector means for an instantaneous disc recorder includin acutting arm, a turntable, anda spindle; a cutting stylusin the cuttinarm engageable with a record "disc placed over the stylus; saidlast-mentioned resilient member having sufficient length to engage therecord surface at a position inwardly toward the spindle of the point ofengagement of the stylus with the record.

WINTON E. McCONNELL. EDWIN L. BRACY.

REFERENCES CITED The following references are of record in the tionpulling another portion of the shaving around 10 file of this patent:

until the shaving engages the spindle and begins to wind up thereon, andan additional shaving collector means comprising a resilient memberswingedly hung on the cutting arm on a pivot located equi-distant fromthe spindle with the 15 UNITED STATES PATENTS Name Date Gay June 20,1944 Number

